Synthesis and Structure–Activity Relationships of EGCG Analogues, a Recently Identified Hsp90 Inhibitor
摘要:
Epigallocatechin-3-gallate (EGCG), the principal polyphenol isolated from green tea, was recently shown to inhibit Hsp90; however, structure activity relationships for this natural product have not yet been produced. Herein, we report the synthesis and biological evaluation of EGCG analogues to establish structure activity relationships between EGCG and Hsp90. All four rings as well as the linker connecting the C- and the D-rings were systematically investigated, which led to the discovery of compounds that inhibit Hs90 and display improvement in efficacy over EGCG. Antiproliferative activity of all the analogues was determined against MCF-7 and SKBr3 cell lines and Hsp90 inhibitory activity of the four most potent analogues was further evaluated by Western blot analyses and degradation of Hsp90-dependent client proteins. The prenyl-substituted aryl ester of 3,5-dihydroxychroman-3-ol ring system was identified as a novel scaffold that exhibits Hsp90 inhibitory activity.
An Au-Catalyzed Cyclialkylation of Electron-Rich Arenes with Epoxides To Prepare 3-Chromanols
作者:Zhangjie Shi、Chuan He
DOI:10.1021/ja031953a
日期:2004.5.1
A gold-catalyzed cyclialkylation of electron-rich arenes with tethered epoxides afforded 3-chromanols stereospecifically.
金催化的富电子芳烃与环氧化物的环烷基化反应得到立体特异性的 3-苯并二氢呋喃。
.beta.-Adrenergic blocking agents. V. 1-Amino-3-(substituted phenoxy)-2-propanols
作者:Albert F. Crowther、D. J. Gilman、B. J. McLoughlin、Leslie Harold Smith、R. W. Turner、T. M. Wood
DOI:10.1021/jm00304a018
日期:1969.7
Synthesis and Structure–Activity Relationships of EGCG Analogues, a Recently Identified Hsp90 Inhibitor
作者:Anuj Khandelwal、Jessica A. Hall、Brian S. J. Blagg
DOI:10.1021/jo401027r
日期:2013.8.16
Epigallocatechin-3-gallate (EGCG), the principal polyphenol isolated from green tea, was recently shown to inhibit Hsp90; however, structure activity relationships for this natural product have not yet been produced. Herein, we report the synthesis and biological evaluation of EGCG analogues to establish structure activity relationships between EGCG and Hsp90. All four rings as well as the linker connecting the C- and the D-rings were systematically investigated, which led to the discovery of compounds that inhibit Hs90 and display improvement in efficacy over EGCG. Antiproliferative activity of all the analogues was determined against MCF-7 and SKBr3 cell lines and Hsp90 inhibitory activity of the four most potent analogues was further evaluated by Western blot analyses and degradation of Hsp90-dependent client proteins. The prenyl-substituted aryl ester of 3,5-dihydroxychroman-3-ol ring system was identified as a novel scaffold that exhibits Hsp90 inhibitory activity.
Syntheses of pterocarpenes and coumestans via regioselective cyclodehydration
作者:Maloy Nayak、Youngeun Jung、Ikyon Kim
DOI:10.1039/c6ob01451h
日期:——
pterocarpenes and coumestans is described. BCl3-mediated dehydrative cyclization of 1,3-diaryloxyacetones under mild conditions permitted regioselective ring closure to afford 3-((2-iodoaryloxy)methyl)benzofurans which were converted to the corresponding pterocarpenes by Pd-catalyzed intramoleculardirectarylation. The subsequent benzylic oxidation led to coumestans. This sequence was applied to the formal